My dear Modge Podge will do the trick for you. Put on 2 or 3 coats on front and at least 1 or 2 at the back. I made myself a fairly big rectangle for working on in the kitchen and did it that way. Am using it for 6 to 7 years and it is still beautiful as in the beginning. Enjoy your coasters.

I wonder if Scotchguard might work also. They wouldn't be as stiff as with the Mod Podge, but liquids bead up and roll off without staining. Guess it depends on the look you are going for.

Thankyou for asking the question I've been wondering about for a while :) Will wait and see what answers turn up.

How about vinyl? It embroiders nicely and shouldn't stain.

Hi Edith,
Try coating with Mod Podge sealer.

There are dozens of fabric sealants on the market, just browse the glue section of your nearest Hobby and crafts or Art store or even some hardware stores carry them in the hobby section.

Many years ago (35+) Hobbytex used to have a sealant for their products so you could use them as placemats. Oddly enough, come to think of it their "fabric" was really only what we now use as Stabilisers.

Hugs n roses, Meganne

Thanks for asking the question Edith!

Check out the fabric stores. I have found a clear plastic with a coating that you just iron on. It is sold by the yard. I finished a blender cover with it a few years ago and recently I bought some more to go on appliance covers. I think I found it a JoAnns fabric shop. Mildred

Edith,
Thanks for asking about a sealer. I never thought about that. I'm going to try the Mod Podge...Barb

That is a really good question. I've made a number of coaster sets, but never gave it a thought that'd they would get stained. I'm going looking for Mod Podge too. Thanks so much for the suggestion!!! Marion

Do you paint the Modge Podge on top of the embroidery? Does it make them stiff? This sounds interesting. I have only used a spray starch on the ones I have made.
Nadyne

I am sorry I did not reply to you all earlier, but felt quite unwell this morning. Lots better now thanks goodness. Thank you all for answers and comments

Seeing that it is so thin what about laminating is this to thick? Then you can cut it out in circles. Just a suggestion .Love Marie

my first thought was the iron on vinyl laminate. i have seen it at some small quilt shops. of course any amount of liquid, like a lot of dripping condensate will just roll off the coaster and oto the surface that way.

i have a plastic backed felt and that might work well. if embroidered on teh felt would hold moisture, but at some load point it could wick to surface below....so i guess i would just slide it under the hoop at the end have it stitch to the border of the coaster. then i would cut it out with a heated knife to seal the edges...just thinking.